<template>
  <el-table stripe :data="formatData" :row-style="showRow" v-bind="$attrs">
    <el-table-column v-if="columns.length === 0" width="150">
      <template slot-scope="scope">
        <span
          v-for="space in scope.row._level"
          :key="space"
          class="ms-tree-space"
        />
        <span
          v-if="iconShow(0, scope.row)"
          class="tree-ctrl"
          @click="toggleExpanded(scope.$index)"
        >
          <i v-if="!scope.row._expanded" class="el-icon-plus" />
          <i v-else class="el-icon-minus" />
        </span>
        {{ scope.$index }}
      </template>
    </el-table-column>
    <el-table-column
      v-for="(column, index) in columns"
      v-else
      :key="column.value"
      :label="column.text"
      :width="column.width"
    >
      <template slot-scope="scope">
        <!-- Todo -->
        <!-- eslint-disable-next-line vue/no-confusing-v-for-v-if -->
        <span
          v-for="space in scope.row._level"
          v-if="index === 0"
          :key="space"
          class="ms-tree-space"
        />
        <span
          v-if="iconShow(index, scope.row)"
          class="tree-ctrl"
          @click="toggleExpanded(scope.$index)"
        >
          <i v-if="!scope.row._expanded" class="el-icon-plus" />
          <i v-else class="el-icon-minus" />
        </span>
        {{ scope.row[column.value] }}
      </template>
    </el-table-column>
    <slot />
  </el-table>
</template>

<script>
import treeToArray from "./eval";
export default {
  name: "TreeTable",
  props: {
    /* eslint-disable */
    data: {
      type: [Array, Object],
      required: true,
    },
    columns: {
      type: Array,
      default: () => [],
    },
    evalFunc: Function,
    evalArgs: Array,
    expandAll: {
      type: Boolean,
      default: false,
    },
  },
  computed: {
    // 格式化数据源
    formatData: function () {
      let tmp;
      if (!Array.isArray(this.data)) {
        tmp = [this.data];
      } else {
        tmp = this.data;
      }
      const func = this.evalFunc || treeToArray;
      const args = this.evalArgs
        ? Array.concat([tmp, this.expandAll], this.evalArgs)
        : [tmp, this.expandAll];
      return func.apply(null, args);
    },
  },
  methods: {
    showRow: function (row) {
      const show = row.row.parent
        ? row.row.parent._expanded && row.row.parent._show
        : true;
      row.row._show = show;
      if (show) {
        return {
          animation: "treeTableShow 1s;",
          "-webkit-animation": "treeTableShow 1s;",
        };
      } else {
        return {                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
          display: "none",
        };
      }
      // return show ? 'animation:treeTableShow 1s;-webkit-animation:treeTableShow 1s;' : 'display:none;'
      // return show ? 'row_show' : 'row_hide'   //row-class-name
    },
    // 切换下级是否展开
    toggleExpanded: function (trIndex) {
      const record = this.formatData[trIndex];
      record._expanded = !record._expanded;
    },
    // 图标显示
    iconShow(index, record) {
      return index === 0 && record.children && record.children.length > 0;
    },
  },
};
</script>
<style rel="stylesheet/css">
@keyframes treeTableShow {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@-webkit-keyframes treeTableShow {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}
</style>

<style lang="scss" rel="stylesheet/scss" scoped>
$color-blue: #2196f3;
$space-width: 18px;

.ms-tree-space {
  position: relative;
  top: 1px;
  display: inline-block;
  font-style: normal;
  font-weight: 400;
  line-height: 1;
  width: $space-width;
  height: 14px;

  &::before {
    content: "";
  }
}

.processContainer {
  width: 100%;
  height: 100%;
}

table td {
  line-height: 26px;
}

.tree-ctrl {
  position: relative;
  cursor: pointer;
  color: $color-blue;
  margin-left: -$space-width;
}
/deep/ .row_show {
  animation: treeTableShow 1s;
  -webkit-animation: treeTableShow 1s;
}
/deep/ .row_hide {
  display: none;
}
</style>
ss